Hi OP,
I'm sorry you are going through such a frightening time.
A number of months ago I was visiting my mum and dad when my dad had what I believe was a TIA.
He had also got up to go to bed, he looked a bit wobbly and was very vacant but didn't fall as me and my mum helped him sit back down. He couldn't answer any questions from me and my mum.
The ambulance arrived quickly and he couldn't answer questions like why they were there, who they were or where they had come from "police or something like that" he didn't know his address but did know his date of birth - which he said a second time when asked for his address.
He was taken to hospital overnight. Mum went with him and I arrived after about an hour because the ambulance suggested they might be stuck outside queuing so I should wait to hear that they had got in.
My dad was already "back" and much more lucid. E.g. he could tell the time on the clock opposite him and grumble about waiting when different medics had said that they would come back.
He was monitored overnight. In the morning when he needed to urinate the medics didn't want him to stand up but he was having none of it and got up and marched down the corridor to the loo. He was discharged later that morning and while my mum and dad had agreed to get in touch for a lift or get a taxi they instead caught the bus.
I has asked a medic in the morning what they can do for my dad (I had been googling and found the risk of a stroke is higher the month after a TIA). They said nothing that they can do really as the treatment would be blood thinners but he was already on blood thinners. I asked if they can up his dose of these but he said they can't as they always have to balance the risk of a clot with the risk of a bleed.
My dad is 80, heavy with not a healthy lifestyle. He had already stopped driving by choice before this.
Was your husband prescribed blood thinners? I'm not saying he should have been at all as that obviously depends on his results to tests. If he was that is his treatment. If he wasn't then that is something he can ask his GP about.
I think your husband perhaps wants to ignore the episode as he is frightened like you are. From seeing this with my dad it seems that there is no magic solution but yes get him to go to his GP who can review his medication and look at lifestyle advice.
Take a look at the "treatment" section here
https://www.nhs.uk/conditions/transient-ischaemic-attack-tia/
I hope your husband is OK now.